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Commitecf51a5

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Split angle annotation example figure in two.
1 parent363bc5e commitecf51a5

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1 file changed

+38
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‎examples/text_labels_and_annotations/angle_annotation.py

Lines changed: 38 additions & 30 deletions
Original file line numberDiff line numberDiff line change
@@ -226,78 +226,86 @@ def R(a, r, w, h):
226226
# according to the value of *textposition*. Usage of those arguments is shown
227227
# below.
228228

229-
fig, (ax1,ax2,ax3)=plt.subplots(nrows=3,sharex=True,figsize=(7,7),
230-
gridspec_kw=dict(height_ratios=(3,1,1)))
231-
ax2.margins(y=0.4)
232-
ax3.margins(y=0.4)
229+
fig,ax=plt.subplots()
233230
fig.canvas.draw()# Need to draw the figure to define renderer
231+
ax.set_title("AngleLabel example")
234232

235-
#### SUBPLOT 1 ####
236233
# Plot two crossing lines and label each angle between them with the above
237234
# ``AngleAnnotation`` tool.
238235
center= (4.5,650)
239236
p1= [(2.5,710), (6.0,605)]
240237
p2= [(3.0,275), (5.5,900)]
241-
line1,=ax1.plot(*zip(*p1))
242-
line2,=ax1.plot(*zip(*p2))
243-
point,=ax1.plot(*center,marker="o")
238+
line1,=ax.plot(*zip(*p1))
239+
line2,=ax.plot(*zip(*p2))
240+
point,=ax.plot(*center,marker="o")
244241

245-
am1=AngleAnnotation(center,p1[1],p2[1],ax=ax1,size=75,text=r"$\alpha$")
246-
am2=AngleAnnotation(center,p2[1],p1[0],ax=ax1,size=35,text=r"$\beta$")
247-
am3=AngleAnnotation(center,p1[0],p2[0],ax=ax1,size=75,text=r"$\gamma$")
248-
am4=AngleAnnotation(center,p2[0],p1[1],ax=ax1,size=35,text=r"$\theta$")
242+
am1=AngleAnnotation(center,p1[1],p2[1],ax=ax,size=75,text=r"$\alpha$")
243+
am2=AngleAnnotation(center,p2[1],p1[0],ax=ax,size=35,text=r"$\beta$")
244+
am3=AngleAnnotation(center,p1[0],p2[0],ax=ax,size=75,text=r"$\gamma$")
245+
am4=AngleAnnotation(center,p2[0],p1[1],ax=ax,size=35,text=r"$\theta$")
249246

250247

251248
# Showcase some styling options for the angle arc, as well as the text.
252249
p= [(6.0,400), (5.3,410), (5.6,300)]
253-
ax1.plot(*zip(*p))
254-
am5=AngleAnnotation(p[1],p[0],p[2],ax=ax1,size=40,text=r"$\Phi$",
250+
ax.plot(*zip(*p))
251+
am5=AngleAnnotation(p[1],p[0],p[2],ax=ax,size=40,text=r"$\Phi$",
255252
linestyle="--",color="gray",textposition="outside",
256253
text_kw=dict(fontsize=16,color="gray"))
257254

258255

259-
#### SUBPLOT 2 ####
256+
#########################################################################
257+
# ``AngleLabel`` options
258+
# ~~~~~~~~~~~~~~~~~~~~~~
259+
#
260+
# The *textposition* and *unit* keyword arguments may be used to modify the
261+
# location of the text label, as shown below:
262+
263+
260264
# Helper function to draw angle easily.
261265
defplot_angle(ax,pos,angle,length=0.95,acol="C0",**kwargs):
262266
vec2=np.array([np.cos(np.deg2rad(angle)),np.sin(np.deg2rad(angle))])
263267
xy=np.c_[[length,0], [0,0],vec2*length].T+np.array(pos)
264268
ax.plot(*xy.T,color=acol)
265269
returnAngleAnnotation(pos,xy[0],xy[2],ax=ax,**kwargs)
266270

271+
272+
fig, (ax1,ax2)=plt.subplots(nrows=2,sharex=True)
273+
fig.suptitle("AngleLabel keyword arguments")
274+
fig.canvas.draw()# Need to draw the figure to define renderer
275+
267276
# Showcase different text positions.
277+
ax1.margins(y=0.4)
278+
ax1.set_title("textposition")
268279
kw=dict(size=75,unit="points",text=r"$60°$")
269280

270-
am6=plot_angle(ax2, (2.0,0),60,textposition="inside",**kw)
271-
am7=plot_angle(ax2, (3.5,0),60,textposition="outside",**kw)
272-
am8=plot_angle(ax2, (5.0,0),60,textposition="edge",
281+
am6=plot_angle(ax1, (2.0,0),60,textposition="inside",**kw)
282+
am7=plot_angle(ax1, (3.5,0),60,textposition="outside",**kw)
283+
am8=plot_angle(ax1, (5.0,0),60,textposition="edge",
273284
text_kw=dict(bbox=dict(boxstyle="round",fc="w")),**kw)
274-
am9=plot_angle(ax2, (6.5,0),60,textposition="edge",
285+
am9=plot_angle(ax1, (6.5,0),60,textposition="edge",
275286
text_kw=dict(xytext=(30,20),arrowprops=dict(arrowstyle="->",
276287
connectionstyle="arc3,rad=-0.2")),**kw)
277288

278-
ax2.annotate("textposition",xy=(.02,1),xycoords="axes fraction",
279-
bbox=dict(boxstyle="round",fc="w"),ha="left",va="center")
280289
forx,textinzip([2.0,3.5,5.0,6.5], ['"inside"','"outside"','"edge"',
281290
'"edge", custom arrow']):
282-
ax2.annotate(text,xy=(x,0),xycoords=ax2.get_xaxis_transform(),
291+
ax1.annotate(text,xy=(x,0),xycoords=ax1.get_xaxis_transform(),
283292
bbox=dict(boxstyle="round",fc="w"),ha="left",fontsize=8,
284293
annotation_clip=True)
285294

286-
#### SUBPLOT 3 ####
287295
# Showcase different size units. The effect of this can best be observed
288296
# by interactively changing the figure size
297+
ax2.margins(y=0.4)
298+
ax2.set_title("unit")
289299
kw=dict(text=r"$60°$",textposition="outside")
290300

291-
am10=plot_angle(ax3, (2.0,0),60,size=50,unit="pixels",**kw)
292-
am11=plot_angle(ax3, (3.5,0),60,size=50,unit="points",**kw)
293-
am12=plot_angle(ax3, (5.0,0),60,size=0.25,unit="axes min",**kw)
294-
am13=plot_angle(ax3, (6.5,0),60,size=0.25,unit="axes max",**kw)
301+
am10=plot_angle(ax2, (2.0,0),60,size=50,unit="pixels",**kw)
302+
am11=plot_angle(ax2, (3.5,0),60,size=50,unit="points",**kw)
303+
am12=plot_angle(ax2, (5.0,0),60,size=0.25,unit="axes min",**kw)
304+
am13=plot_angle(ax2, (6.5,0),60,size=0.25,unit="axes max",**kw)
295305

296-
ax3.annotate("unit",xy=(.02,1),xycoords="axes fraction",
297-
bbox=dict(boxstyle="round",fc="w"),ha="left",va="center")
298306
forx,textinzip([2.0,3.5,5.0,6.5], ['"pixels"','"points"',
299307
'"axes min"','"axes max"']):
300-
ax3.annotate(text,xy=(x,0),xycoords=ax3.get_xaxis_transform(),
308+
ax2.annotate(text,xy=(x,0),xycoords=ax2.get_xaxis_transform(),
301309
bbox=dict(boxstyle="round",fc="w"),ha="left",fontsize=8,
302310
annotation_clip=True)
303311

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